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i ee er book, not from thg, however, cannot bersion for attribution. Video aDnids pVlaisyiso,n Work, pnv al pamattiative e origincific forauthorit osed from XML files created from thding styles, and other typesetting-speprint version of this publication as the CoPmamneisl soionn I monp aBcNet hoaaCtfvi ooVionmiradmale lRo iat teVnesdeiee aSowroncic hnVi gaCi lso oiSnouc nnViecinislcioens aonf dW Eodrukceartsion been recompd breaks, heaease use the s orPl ginal work hane lengths, wally inserted. the original; liccident n of e orien a ohe w digital representatie breaks are true to thic errors may have b egp naa file: This ng files. Pme typogr PDF esettind so ut this nal typned, a NATIONAL ACADEMY PRESS ogiai Washington, D.C. 1983 Aboriret ii ee er book, not from thg, however, cannot bersion for attribution. 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Pme typogr PDF esettind so ut this nal typned, a ogiai Aboriret iii ee er book, not from thg, however, cannot bersion for attribution. EDWoPAfa TRneDeclh Jno. onRlo IIgNmyApLaDcUtC oCf IV (Cidhaeior )V, iSecwhoinolg o of nP sVycihsoiolong yo, fG Weorogriak eInrsstitute pnv al pamattiative JRAONBEETR BT EDR. TCIANPULSAONN,, IAnsltbieturttae Ffoerd Seroactiiaoln R oefs Leaarbcohu, rUniversity of Michigan e origincific forauthorit ROBUEnRivTe rMsit.y GUION, Department of Psychology, Bowling Green State osed from XML files created from thding styles, and other typesetting-speprint version of this publication as the VDSHALHTAL.AIA NAFWLRVCROUPRNERIRaEeDpnEELYtsEhiNtD EveeH tNTaTrheY Ls.rArCaS .oc sMSl WOEShinmSLt,K. y M N. 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BIESRSO,O NSW,t uANddy, m SDtiainrfiefsc tArtoastrsivoec iSateecretary the original; liccident GRAY JACOBIK, Secretary n of e orien a ohe w digital representatie breaks are true to thic errors may have b egp naa file: This ng files. Pme typogr PDF esettind so ut this nal typned, a ogiai Aboriret iv ee er book, not from thg, however, cannot bersion for attribution. DERCEaKli fHor.n FiaE INnsDtiEtuRte ( oCfh TCaeiroc)hm, n omJlooirgtgyteenes eonn L Vabiosriaotonry of Information Science, pnv al pamattiative AELNITOHTO LN.Y B AEDRASMONS,, S cBheoroml aonf -OGputnodm eLtrayb,o Urantoivreyr sfiotyr otfh Ce alSiftuodrnyi ao, fB eRrkeetilneayl e origincific forauthorit NIGEDLeg Wen.e rDatAioWns,,1 D eDpaerptamrtemnte notfs O opfh Pthhaylsmioollooggyy , aHndar vBairodp Mhyesdicics,a lW Sacshhoionlgton osed from XML files created from thding styles, and other typesetting-speprint version of this publication as the LLJDJDKDUOLUOEOOLHOINRNNSIPUFNY AOAA erMn DaNNnETLLinnv. .AHDD cK HsePDiKEy rsARAGOsOlcAAviUOo..CtW a yYFPFEHn OIJSLAMiNTBAacIXMZTNAEhM,AoSRA1GNEo ,,G 1,,,2l S 21 C , o O 2 Co fD DD NlS oMleDeeeml,p2lppgeee aiaaedptgrhrr i ateottcm-rmm fiK ton meOeefeenD nnetOptttten lt oppeoootf twamffo o ZrfPBemte omlsPtileoryo seytlclyrnoIo,hy cntgUgo, hs yylUtnoo,oi, ilt ngUfHvou iyegtnvaer,yPrie sNvv,rsi otesaCyeyirfrcwto s dyhoil Vt uofUYoy mlHif onoso bHgiourfvkiy uaoaGe l,sU ur tUesosnSoiUtnntiorcyvingniveeiievarnrsecsiretisytsiy,t y Saonf been recompd breaks, heaease use the RHOABRNREReeRYsueTr ao SrbcNSihoEY,l KoVDgUiEyrLg/RPiE,nh Riya ,s DPio oellpoDyagteryetpc,m ahNrentonmicrt t ehInonwtfss et isItntuoedtfre un sa PUtnrsidnya iclSv hteoEarltsnoeig tgUyiynn,e ievOreinrpsghi ttyhaanldm oOlopgeyra, tiaonnds s orPl ginal work hane lengths, wally inserted. SKBtAEaYfRf BDAISRMAU SK. BERS,O SWtuNdy, SDtairfefc Atosrsociate the original; liccident RLLAYYNM MON. EDL PL.I BSORNIG, GASd,m NinRiCst rFateilvloe wSecretary n of e orien a GRAY JACOBIK, Secretary ohe w digital representatie breaks are true to thic errors may have b egp naa file: This ng files. Pme typogr PDF esettind so ut this nal typned, a 1 Member as of July 1982 ogiai Aboriret 2 Term ended June 1982 PREFACE v ee er book, not from thg, however, cannot bersion for attribution. Preface pnv al pamattiative e origincific forauthorit In the spring of 1981 the National Institute for Occupational Safety and osed from XML files created from thding styles, and other typesetting-speprint version of this publication as the HcvtRVtvpdohrihiieeiied esydtsapw eireselcloetidaioaTahosn ryi lvoh lvVcg oil(erhet,eviNg ee r eweNvcisCwIc iehiOianaeon inrt lnwSeugio sogmHn,o clp n oocipaoa)aaegifn tnirlln iynrt'a cestieRV,ilic sx nqyfi,euCiiig ulzsssclleoe eiatue oip msramqnmn,atir uegdmnc ieode nehdotsifs mah tt pttCttWuioheiihtondoodeeetnogilc uh oeosrN honals.kgeo nlnc anemygioi Itrgcl,iinVf s ocoai a, onlali vnpow scelraip giecesaoplhoysuur rnriipiA,apeconn olahabgcet nste oilas,ih ses dotdphaseam rnetu spubeoam seamlltpml,ieson ysr ava eeehh enantlpeeotnr ndhaadmyffct i rla , osste eScth uudhmttc,ognoor e iteb gter crheqsaenePuoir,udrssc laecs otaeiendrc anmssewle utti dpiil,npoitno otoeati nohrton stohtn i urd.eocbeo nuxcn Iifdsopum afNtreupeplrep rrinhaastatattcyavieliicstk sooaitieadier onnc nce oinaashndoafll,, been recompd breaks, heaease use the oarreg adneTiszhcairstii boreenpdao li rnpt sAfyopccphueosnelods gioxyn .D tTh.he es iaxr eisassu oesf tehxapte NrtIiOseS oHf ainskdeivdi dthuea lp apnaenle lt om aedmdrbeesrss: n of the original work has e original; line lengths, woren accidentally inserted. Pl 231... paedrIWHesnrir ggsoodhepoedw axlnnutai e"oscywpvrtme iari enostdiligucblioc s,aln hkeacla anmronreromadafs wta ctefphatotl,ieer eegreerr dtufit vgsicoeenite.nr"si) m c cv?usso iaua aIdulnfsn efn cfdoitt(aech e cc ivermeotiteronneoedertwt a sraitas innornusae tgnralae ea ddtsusttte ee narouq mbdafnulte ppdaiitrsohhttesiheseytrn ,olss gbayeoid aio dtncseoll?igooqu s ngdum mfcieaocieftneareip ncla ts,shens tt? aaca"snneneu didysbaamejrreslddsetcir svtzat ieihvifnlnoaesg"rt,, ohe w digital representatie breaks are true to thic errors may have b 4. vvtoToivio eee wwsrwuhiihnnbeagagsttd avcenioxddnteaedorndi ttd iioasornppesl e,at rhyase tuti ecnprhgrmo baicnsloea nmltshd?sei t iropenposor trito(eend. g wo.,f i tehox pvceeirdsaestioov retse ' rgmtilmainreea lssf prdoeunmet egp naa file: This ng files. Pme typogr PDF esettind so ut this nal typned, a ogiai Aboriret PREFACE vi ee er book, not from thg, however, cannot bersion for attribution. 5. iepsWlavsluiyehdmnca h taiu onbcnsaaodotnuiec otrib n atie)lhd ,ees faa aariclnde tvdol aia retbstiw oooi niunnw t g ovth hficsa eouvt nairsedelu xlipatatirteloio nvnsbteys l ?emwrmopolsetuo slem dno scft ohveueninsscuetoe aurlpe,n rdteoe?rbr geWloednm hoaasmnt drice camm,n a oanbirndee pnv general stress responses (e.g., general fatigue) to other aspects of al pamattiative the worker's job? e origincific forauthorit 6. eHnocowu ndtoer evdi suina l cpormobplaermabsl ei nt avsikdse, o suvciehw ains g pcroolmonpgareed weditihti ntgh ooser s been recomposed from XML files created from thord breaks, heading styles, and other typesetting-spePlease use the print version of this publication as the cdirsptdhofhteetoifreisupdseg esn dpw poehiicgsnilrarleoeaBITuaytnfrrnsysrolbe ,onek g rdsa ceetto.eomtfhe gardafrbufrgeue ma n myr onvsttttfc iaheinhcitiilooasyenna eioanluuelbpeart md msa r loitbi ,ssnlearir t ae cuascsgmt (fnu h u dth Vuodd oynoerinonfeaivDf inif spco stectgipciTiwtanetyaogi ursnnsoslsino nss n) e ns srcc,n,ltlt kisoiio? heuattoe hefhengandnni rerenczldysstaVle eai d tpcsirroVutD tnatndhaafsrenDdTese ne dt epu dsd eaT pl um si cn wwn aotbahdrwa nlnolliidna ysitae roichbior llkvsc r e o cbeisaakVrdpsruyernle eur sDsvm dteic asasiua sTilieapsosden sokw nuorsnfeiinsgduesosodtes,siaas nnc d uu tnoticn V iamoaeifvtdenz tis Dreiw eVocead.vo sdoTnpt TsDe ni tn,r oro h oeTswasvnwi efsiemr piad ietio dptlirsenllah creoaisarpgtkt lou mbnaeeseprt etoersyah diloasl,rvadcqe it.,tcaseehi uu aapels oanriustt slnellihodsa,oiosd ee t hy,gndyu pla ay eir,stoav ineebtx smflertrwcocsi hym lguhpr ua,vahu eaibhtdintt psadnleoiiaae nonnegerirltdnonnyggeess ginal work hane lengths, wally inserted. a(iwnsnuovdmri ktemevdria sstr.oi ioDz npei drsec obsuefys n sBtiw otrnhoo erwpkirane n rresee tls sea oalin.rn,c c1hlAu9 od8une2g d)uV. ssIDtcn iTve2esn0s tat-iis2ngt1dsa,, t towor1 shr9 oef8rv 1oai,emn wa lia ynfrz ioeeulWddn dtase sutchhrhivenne giwyctsaoo lnro l,adf s VpwDeDe.cCrtTes. the original; liccident owfo rVkeDrsT. Tsthued pieasn, ela nhda s ldabraowr nr eopnr ethseen staytmivpeoss, iuwmh op rdeseesncrtaibtieodn st haen dc doinscceursnssio nosf on of he orieen a in anaTlhyez inpgan tehle riescsuoegsn idziesdc uesasreldy inin t hitiss rdeeploibret.rations that visual issues in VDT w digital representatie breaks are true to thic errors may have b wicednoxiocsntclrecukunedE ssrmisiannvirusogel sny ltyt a bh bnadyeedt r pqa tchfauontenasne e lpseilita dodymnsfe e oerlemfm'fs do Vba mrwe tDeerirsieTtni,hta ficilwnon ogr onmtwshrs kauaeestnr litltedoaaa nnrtiigps.to se rnc,er To apecnhnaqosidrsunie d sitdpeet laxmrafetfrf edog.o n reTfe tr x,h t thpejhocel epiob c wan indttpoleeeayrxlskn 'tiisie ng nla n'gwtsn,h aaeialssrnny e vrdsveied irpwseiooswnocrmtur .kseaesnnerstdd,' egp naa file: This ng files. Pme typogr PDF esettind so ut this nal typned, a ogiai Aboriret PREFACE vii ee er book, not from thg, however, cannot bersion for attribution. oCcaranhfad dapisr aluaoatcrninvot eentrhy iaese n tmmcidcoie ssnt shcoiRoeof dronnvobssa,le orroaigtofn y udt sh Ga eAntu ydllipfao rbeneosod.f r o pScfJs ooaywmmncoehmmrto kuesirnon Bicgateiy nars.dlt i iD tnuiHsauasuvstuiogioednhns S sR wliip.nne re Troewyva yihrpdleiroecvedhrip e aaVwrngeDeadudlTy i dsbszau eyanrd rvc Reeei soy usbsus eoeoerndsft pnv involving epidemiology and cataracts. Vincent King, Edward Rinalducci, al pamattiative Stanley Smith, Harry Snyder, and Lee Task prepared material on lighting and e origincific forauthorit rHe.f lEec. tKiornose manedr ddriasfptelady m teactehrniaoll oogny h. uPmanaenl faccotnosrusl tfaonr ttsh eM paarntienl 'sH deilsacnudsesri oann. dK Key. s been recomposed from XML files created from thord breaks, heading styles, and other typesetting-spePlease use the print version of this publication as the DdBMvaMVNarc1ceshonri9riDIpssaeaaldsi8OuilwogrrpmT sa2rtaKrgSttbiii AT tleeunnsttH eouthdrhk, plg.y srcsl eH eee a eCBLhi sDirtnmw.epanp aifao lvoiap wCaleeamprstpenrtenrmnmireomr aeemmveeedernr lbupilsfane oties tfek, satnrchu rawoturu receeeelslreappmssite e n tdlna rSoo S. lpo oom n g n utorPrffvat mbe eno na htriaievpt hfrRd kdayhls iniaeVle tezs.lte errew ludaeme eeiilfrVd sdsdsihidviptei it ay aein iaoeaJmiltcea,nrtndof hnn hswaco wbe he do t cHrfleceu mn nhmo srwrodmrsao uiwrseent cardem mvoamt rohcterhioitininelrf msesobeun,ea gtuor t nehs paihallantr oaiiyoahrptelo tolcy s ,ueee Jpnt npuk nrcgahtucras aalaeor ohelh.oncstnsdi n vtudauamkdT eUf taiprinrus rlthdseors n oti alcaeuee bt iH taoAuonndrsv urcn.ns erdt oeitprt dstev a rchisfgpeto dts ihu heiuedeicr scfbn etnwei ubyyisad ecnvdlytsaml srteoulaitiot i gyelaxm dolpNfio, wf n yn ptffBomRCorea s. aetam..sneaCanoev n adnlBHeersi aidr e dtlff nalfai oewc ynatirdrlormchnb crgl nrnyo edats deiio s wrrttVaierraSiauran,aeqts n D fl nifpR BuSttndtFyaasTose.gaae fnde r fysrroBbtteooedk. wmfrr rfcafse J uo otTr ooltaaittewehfrnnnhhhhro ykiydgdnnaeeesr,, ginal work hane lengths, wally inserted. rBcpeorepomhovamrivtd eieonbdrty as vl tamhlaueen amdpb ableneS eroisln c dsioairgfel hwttS hsuc eipo eonnCn coc eimosnn mcpaeirntpetdpet ueaa rElio ndingus cstauVhteeiisos finoit nhnara oln auvdnge dhro sotituhohtene r. t hJCeeuo xlcimpaoenmur trHisss,eso icowohnfhb oetohrsngee the original; liccident smtuaddye haenldp fcuol nctorimbumteedn tst oa nthde s udgegveeslotipomnse notn othf et heen tiernet irreep orertp oarntd; Dcoenrterkib uFteendd teor on of he orieen a tchoem pmaintetel'es, dinis cpuasrstiicounl aorf Asenvtheroanly k Aeyd aismsus,e sE; liaontd L s.e Bveerraslo no,t hDero rmotehmeab eJrasm oefs othne, w digital representatie breaks are true to thic errors may have b awNVnaaidsstu i oLaBanlus aaSsirlsic bs iEPtaeerryndaoec e SeinIns.n z; B saiatt,rin sotp duwrr toDeenvv; o piiAnedlawaeryldt dhe b hudPyer ia lt pJtcssafou,um mbals ptmc totaohelnmsentk itmUasy l,ne saniaovnttlse di tcr haisintnieetv dydaS olsmufufra igoHtbghmloe-euK s rtDseiotootaltnevnl,esi. .dwc o TeClhlllaoe b gIcnoaosrnatm,it tmuattie t ttheoeef egp naa file: This ng files. Pme typogr PDF esettind so ut this nal typned, a ogiai Aboriret PREFACE viii ee er book, not from thg, however, cannot bersion for attribution. ieipnndagtinet eegwldrL'ias tl thdysery n uam tfshMt pest o.o dos Eciifus lolcmtoieusrc osdahsnininn odiapn ctmra eool ev afemin dtiidaesn tsdgmeu sreea.iasxn lpa,i egnwre t t rthoahedtee m rsesitpnuuoipdsrpyttrl..a e ItmSnivh eaeend taadanlristydio o msnhe,aec stlrephereetiad aro li,rao glra agnanadsinsz iiehzsdeeta l pantnhecddee pnv throughout the study. She took care of many administrative details, helped al pamattiative arrange meetings, and was centrally involved in preparing the manuscript for e origincific forauthorit pdrraofdtus cotino na. VInD Tth,e s hper ogcaeisnse do ff iersftfhicainedn tleyx paenrdie necxep einrt lsyo mpreo douf ctihneg cmonacneursncsr iopft osed from XML files created from thding styles, and other typesetting-speprint version of this publication as the VWtavhdeDeerv s TiCicaEKPo oerAwDnEe m.N WYoogmnrE rADk LaieRsoIt SrseOrDsiMfgo.Nu aJnGUl n.V RKirfozIaonIDEiyrNn S E BgAJt,Oh a eSLecth TVhDioarUeIbUv E sDiiCmkkWoYC iraalaI lINtsDlf,e s uGCIariRlisnH atEdaelA s CdSsiI TnRiowsO ctitaiRthahnel c sSere.ecc piEreeountragct reeiasna nilaa dtn adGse kxrEospd heaumrnctdlaay ntw i,oe onodr,nid tg e tpadhvr eoet hc sheetaes sflfpfiinn fougafll. been recompd breaks, heaease use the s orPl ginal work hane lengths, wally inserted. the original; liccident n of e orien a ohe w digital representatie breaks are true to thic errors may have b egp naa file: This ng files. Pme typogr PDF esettind so ut this nal typned, a ogiai Aboriret CONTENTS ix ee er book, not from thg, however, cannot bersion for attribution. Contents pnv al pamattiative e origincific forauthorit osed from XML files created from thding styles, and other typesetting-speprint version of this publication as the 1 ESuxmeIFncimuterSBFOTTltaodiothhvrardu ygcSceeeud uka tocLNiSunsgetf uidiiars otozFomi tefoeanuiur nstmftranih edtoRodaue inofrn ar S yfeVdgo tVisfBuDa dtDtaThiysoTe enW RW Eoemorpkroikesrrtssi oann dfr oWmo rVkDstaTtsions 110015556778 been recompd breaks, heaease use the EquVFCiiapDetmlaTdre aDSncutet srasvingedny Wsa Bnodar skDesdtias optinloa nyS eDQlfeu-sRailgeintpyorts of VDT Operators 11115543 n of the original work has e original; line lengths, woren accidentally inserted. 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